window.addEventListener('load',function(){





let  ZH=document.getElementById('zhanghao');
let SM=document.getElementById('saoma');
let  bd=document.getElementById('biaodan');
let  em=document.getElementById('erweima');
let an=document.getElementById('anniu')

    
ZH.addEventListener('click',function(){
    bd.style.display='block';
      an.style.display='block';
    em.style.display='none';
})


SM.addEventListener('click',function(){
    em.style.display='block';
    an.style.display='none';
    bd.style.display='none';
})




an.addEventListener('click',function(){

   
let name=document.getElementById('name');
let psd=document.getElementById('password');
      
  let anniu=document.getElementById('anniu');



  anniu.addEventListener('click',function(){
       
      arr.forEach(function(v){
        
      })



  })




})












})